Cb450/500t track bike

deepwaterimports

Over 1,000 Posts
Tacho came


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slikwilli420

Been Around the Block
16mm master on one AP caliper is way too big. Using the vintage brake ratio chart, the 12mm is a perfect size. I run the 12mm Brembo and a single AP caliper on my race bike and the brake feel is great. I wouldn't use anything else.
 

deepwaterimports

Over 1,000 Posts
slikwilli420 said:
16mm master on one AP caliper is way too big. Using the vintage brake ratio chart, the 12mm is a perfect size. I run the 12mm Brembo and a single AP caliper on my race bike and the brake feel is great. I wouldn't use anything else.

What about with a 100kg rider and two callipers


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irk miller

You've been mostly-dead all day.
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At Vintage Brake, he says the perfect feel for a twin caliper brake has a ratio of 27:1. Your AP brake has (2) 43.1mm pistons, so according to his chart, that's 11mm. 23:1 will give you a firm brake, which is probably what Willi likes @ 12mm. The issue with the larger bore is that you won't get any brake until the wheel locks up.

 

doc_rot

Oh the usual... I bowl, I drive around...
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irk miller said:
At Vintage Brake, he says the perfect feel for a twin caliper brake has a ratio of 27:1. Your AP brake has (2) 43.1mm pistons, so according to his chart, that's 11mm. 23:1 will give you a firm brake, which is probably what Willi likes @ 12mm. The issue with the larger bore is that you won't get any brake until the wheel locks up.

they're opposed piston calipers so there's 4 live pistons for a dual caliper setup. also the correct size is 41.3mm pistons. 16mm is the correct size as with a 41mm piston that puts the ratio at 26.7. As I said i run Grimeca copies of these calipers and have great brakes with a 16mm MC. I also run a 12mm on my single caliper brembo replica and that works well. the advantage the Brembo or Grimeca has over the Lockheed is they can accommodate a larger diameter disk. The Brembos are the nicest as far as fit and finish of the three.
 

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irk miller

You've been mostly-dead all day.
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doc_rot said:
they're opposed piston calipers so there's 4 live pistons for a dual caliper setup. also the correct size is 41.3mm pistons. 16mm is the correct size as with a 41mm piston that puts the ratio at 26.7. As I said i run Grimeca copies of these calipers and have great brakes with a 16mm MC. I also run a 12mm on my single caliper brembo replica and that works well. the advantage the Brembo or Grimeca has over the Lockheed is they can accommodate a larger diameter disk. The Brembos are the nicest as far as fit and finish of the three.
My bad. I thought we were talking about the OP's AP Racing twin caliper in this pic:

 

deepwaterimports

Over 1,000 Posts
All good points I will throw them on and see how she goes. Ended up getting this master.


https://www.officine08.com/p75615_front-brake-master-cylinder-classic-16mm.html




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Pete12

Been Around the Block
MickyC said:
Sorry mate only jump on when I remember and don’t get alerts I should set it up but. As soon as I get the starter I’ll give you some pics and details mate pick her up next weekend.


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Thanks mate, much appreciated.
 

deepwaterimports

Over 1,000 Posts
More pics Pete. Unsure about the gearbox let me know what other details you are after.


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der_nanno

Faster!
That's a bit sketchy in the welding department, but I like it. (And judging by the tyre it works, so who cares about the welds!)

I would suggest fitting a bigger sprocket on the engine though. Yes, this will slow the starter down a bit, but the chain won't have to go around such a sharp turn, massively prolonging the life of the chain and probably even freeing up the odd horsepower.
 

Brent

Been Around the Block
With your big slick design and the conversation on gearing, I can't help but wonder what the LSR for a 200cc starter motor is.
 

deepwaterimports

Over 1,000 Posts
Starter fixed and running on a throttle now. 7/8 bar welded to the top and new throttle assembly. She’s working a treat. Now to start on the bike
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